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All Journal Journal of Indonesian Economy and Business Riset Akuntansi dan Keuangan Indonesia
Usman Arief
Department Of Management, Faculty Of Economics And Business, Universitas Gadjah Mada
Economics, Econometrics & Finance

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Study on the Wandering Weekday Effect in the Indonesian Capital Market Based on Trend Moderation Effect Usman Arief
Riset Akuntansi dan Keuangan Indonesia Vol 5, No 1 (2020): Riset Akuntansi dan Keuangan Indonesia
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/reaksi.v5i1.10424

Abstract

This study investigates a wandering weekday effect, an assumption anomaly from fixed weekday effect to changes over time, under the moderation effect of market trend. We employ daily price data from the Jakarta Stock Exchange (JKSE) from 2000 to 2019. This study reveals that the fixed weekday effect has diminished when we introduced a market trend. Using robustness of distribution error, our further studies find that there is a negative wandering Monday effect when the market is falling. The findings provide a crucial contribution to market efficiency and help to reconcile mixed findings in previous studies
Day-of-the-Week Effect and Investors’ Psychological Mood Testing in a Highly Mispriced Capital Market Rizky Luxianto; Usman Arief; Muhammad Budi Prasetyo
Journal of Indonesian Economy and Business (JIEB) Vol 35, No 3 (2020): September
Publisher : Faculty of Economics and Business, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jieb.54377

Abstract

Research Aims: This research examines investors’ psychological moods which cause day-of-the-week anomalies in highly mispriced stock markets. Design/methodology/approach: We use a sample from the Indonesian capital market as, in the Asian region, this country is considered to have a highly mispriced capital market. We decompose the stock price index in Indonesia into speculative, less speculative, and non-speculative indexes. We employ the mean and variance regressions to control the heteroscedasticity and serial correlation. Novelties: Our novelties are two fold. We postulate a method to decompose stock price indexes in Indonesia (the JKSE, LQ 45, and Kompas 100) into speculative, less speculative, and non-speculative indexes. Secondly, we estimate the mean and variance levels simultaneously to get a robust estimation result of the anomaly. Research Findings: We empirically find that the behavior mood hypothesis is supported only during normal periods, when investors tend to be irrational and use their good mood to trade on speculative stocks on a Wednesday and sell them on Monday. In other periods, rationality and psychological effects play a role with Indonesian investors, when their mood is good they are more active in trading less speculative stocks, to avoid higher risks and earn higher returns from those less speculative and non-speculative stocks.
Co-Authors Muhammad Budi Prasetyo Rizky Luxianto Zäafri Ananto Husodo